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ChemistryLiquid SolutionMiscellaneous/MixedEasy2 minPYQ_2020

ChemistryEasynumerical

If the freezing point of a $0.01$ molal aqueous solution of a cobalt (III) bromide-ammonia complex (which behaves as a strong electrolyte) is $- 0.0557 ° C$ , the number of bromide(s) in the coordination sphere of the complex is [ $K_{f}$ for water $= 1 .86 K$ $kg m o l^{- 1}$ ]

Answer:

1.00

Solution:

$Δ T_{f} = i K_{f} m$
$0.0557 = i \times 1.86 \times 0.01$
$i = 3$ , means complex will give 3-ions

Hence, formula should be $[Co {({NH}_{3})}_{5} Br] {Br}_{2}$

Stream:NTA_ABHYASSubject:ChemistryTopic:Liquid SolutionSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2020

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